Lecture 10: Predicting Ionic Formulas and Naming Ionic Compounds

What is an ion?

An element whose proton and electron counts are not equal

What is a cation?

An ion with a positive charge

What is an anion?

An ion with a negative charge

What is ionic charge for Ag (silver)?

+1

What ionic charge does Zn (Zinc) and Cd (Cadmium) form?

+2

Why do atoms form ions?

They want to achieve a full valence shell of 8 electrons

What ions to metals form?

cations

What ions do nonmetals form?

anions

How are ionic bonds formed?

Through the attraction of a positive ion to a negative ion (charge attraction). The ions will add to one another until the charge is neutralized.

What is an ionic compound?

Usually between a nonmetal, and a metal. It is formed through the charged attraction of ions to form a neutral compound

What is a polyatomic ion?

Ions that contain more than one element but have a single charge. Usually covalently bonded non-metals.

What is the only difference between writing monoatomic ions and polyatomic ions?

When you need more than one polyatomic ion in a compound, you must place parenthesis around it